Sensaphone CELL682 - Manual (Page 23)

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Chapter 2: Installation
groUnding
Connect a #14AWG copper wire to the earth ground terminal (marked “EG”)
on the left end of the terminal strip and connect the other end to a ground rod
or metal cold water pipe (See Figure 6). It is extremely important that the earth
ground connection be as short as possible. The ground rod should have suffi-
cient depth to provide a low impedance connection to earth. This connection is
required for the surge/lightning protection circuits to function properly.
NOTE: Proper earth grounding of the Cell682 is required for warranty coverage.
Ground rods can typically be found at local electrical supply houses and/or hard-
ware stores. You MUST contact your state “Call before you dig” hotline at least
two days before you install your ground rod, to insure that it is safe to install the
ground rod in a chosen area.
Figure 5: Grounding the Cell682
wiring sensors to dry contact inpUts
The Cell682 has 8 Dry Contact inputs that can be used to monitor Normally Open
(N.O.) or Normally Closed (N.C.) sensors. In addition, they can also be used for
pulse counting and equipment run-time accumulation. When used for pulse count
or run time functions, the unit will count the pulse (or accumulate time) when the
input changes to the opposite of its normal state.
Dry contact sensors are wired to the terminals labeled D1 through D8. The cor-
responding Ground terminals are located on the lower level terminal strip. The
input type is programmed within the Cell682 Software or website.
WARNING: Do not use sensors, switches, or relays that supply any voltage or
current to the Cell682.